ABSTRACT: A busy beaver is a Turing machine of N states which, given a blank tape, halts with an equal or higher number of printed symbols than all other machines of N states. Candidates for this class of Turing machine cannot realistically be run on a traditional simulator due to their high demands on memory and time. This paper describes some techniques that can be used to run these machines ...

Recent years have seen significant changes in the way scientists view microglia and their role in health and disease. For decades, it was presumed that microglia were stationary, inactive immune cells in the brain, waiting for an immunologic insult to call them into action. In contrast, modern imaging techniques have revealed that microglia are constantly in motion, surveying their environment....